Introduction:
Yes, case studies can be effectively used to analyze the complexities of resource conflicts, environmental degradation, and sustainable development goals in shaping interstate relations, diplomacy, and cooperation within the framework of international politics in Political Science and International Relations (PSIR).

Analysis:
Case studies provide a detailed examination of specific instances or events, allowing for a deeper understanding of the complexities involved. By analyzing resource conflicts, environmental degradation, and sustainable development goals through case studies, the following aspects can be explored:

1. Resource conflicts:
- Case studies can focus on specific conflicts, such as disputes over water resources or oil reserves, and examine the factors contributing to the conflict.
- They can highlight the role of power dynamics, economic interests, and environmental factors in shaping interstate relations and cooperation.
- Case studies can also analyze successful examples of conflict resolution and cooperation, providing insights into effective strategies for managing resource conflicts.

2. Environmental degradation:
- Case studies can explore the causes and consequences of environmental degradation, such as deforestation, pollution, or climate change.
- They can examine the role of different actors, including states, international organizations, and civil society, in addressing environmental challenges.
- Case studies can highlight the importance of collective action, cooperation, and diplomacy in finding sustainable solutions to environmental problems.

3. Sustainable development goals:
- Case studies can assess the progress and challenges in achieving specific sustainable development goals, such as poverty eradication, access to clean energy, or gender equality.
- They can analyze the role of international agreements, institutions, and diplomatic efforts in advancing sustainable development.
- Case studies can also highlight the interconnections between different goals and the need for integrated approaches in addressing global challenges.

The framework of international politics:
- Case studies provide empirical evidence to support theoretical frameworks in international politics.
- They allow for the application and testing of concepts, theories, and models in real-world contexts.
- Case studies can help identify patterns, trends, and causal relationships, informing policy-making and decision-making in international relations.

Conclusion:
In conclusion, case studies are valuable tools in analyzing the complexities of resource conflicts, environmental degradation, and sustainable development goals within the framework of international politics in PSIR. They provide in-depth insights into specific instances, helping to understand the dynamics of interstate relations, diplomacy, and cooperation. By examining real-world examples, case studies contribute to a comprehensive understanding of the challenges and opportunities in shaping global governance and sustainable development.